Master dataset for 'Securitization of Time' (quarterly).

Files:
- securitization_of_time_master_quarterly.csv : analysis-ready quarterly dataset (2000Q1–2025Q2).
- securitization_of_time_master_data_dictionary.csv : variable descriptions and sources.

Notes:
- REI is constructed as the equal-weight mean of z-scored components (short_maturity_share, flow_sensitive_share, floating_rate_share),
  standardized over the full sample (2000Q1–2025Q2).
- WALCL begins later than 2000Q1, so walcl is missing in early quarters. EFFR is missing in the first two quarters.
  This is expected; regressions that include these controls should use a complete-case sample or start from the first quarter with coverage.
- The dataset retains 2020 observations; empirical specifications may exclude 2020 as described in the paper.
